12213056564 has 12 divisors (see below), whose sum is σ = 22630075524. Its totient is φ = 5747320704.

The previous prime is 12213056561. The next prime is 12213056573. The reversal of 12213056564 is 46565031221.

It can be written as a sum of positive squares in 2 ways, for example, as 10050062500 + 2162994064 = 100250^2 + 46508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213056561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89801819 + ... + 89801954.

It is an arithmetic number, because the mean of its divisors is an integer number (1885839627).

Almost surely, 2^12213056564 is an apocalyptic number.

It is an amenable number.

12213056564 is a deficient number, since it is larger than the sum of its proper divisors (10417018960).

12213056564 is a wasteful number, since it uses less digits than its factorization.

12213056564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179603794 (or 179603792 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 12213056564 its reverse (46565031221), we get a palindrome (58778087785).

The spelling of 12213056564 in words is "twelve billion, two hundred thirteen million, fifty-six thousand, five hundred sixty-four".